Ski-pole



ZMZEH July l2, 138., A. MLLER-Rosen SKI POLE Filed May 22,' 1937 ALICE gNvNToR ATTORNYS Patented July 12, 1938 UNITED STATES PATENT AOFFICE Application May 22, lesmseriai No.` 144,155

In France April 193'?v 3 Claims.

This invention relates to skis, and refers more particularly to a ski-pole of light and sturdy construction and a method of manufacturing the same. i

`Ski-poles known heretofore break rather easily bent without breakage.

Another object is the provision of a ski-pole which: will not split or crack when subjected to rapid` variations of temperature.

A further object is the provision of a ski-pole which can be used on high vmountains at altitudes of 12,000 tok 15,000 feet above sea level and whichl can be left out-of-doors over night at such high altitudes without cracking 'or showing any signs of deterioration.

The above and other objects of Vthe present invention may be realized through the provision of a ski-pole comprising a hollow shaft or pole consisting of a fully grown reed or cane which is filled with pith or filling consisting of the same material, said filling being impregnated with a special substance and being glued to the pole. The shaft carries a disc comprising a ring made of anti-corodal and filled with impregnated pith.

The invention will appear more clearly from the following detailed description when taken in connection with the accompanying drawing showing by way of example preferred embodiments of the inventive idea.

In the drawing:

Figure 1 is a perspective view of a ski-pole;

Figure 2 shows on a larger scale a portion of the ring connected to the ski-pole;

Figure 3 is a section through the ring shown in Figures 1 and 2;

Figure 4 shows a portion of the ski-pole illustrated in Figure 1; and i Figures 5 and 6 show portions of ski-poles of somewhat different types.

'I'he ski-pole shown in Figures l to 4 of the drawing comprises a rod or pole 'I made of fully grown tonkin or tongking reed or pepper reed. The rod is bored throughout its entire length, care being taken that the hollow bored-out interior of the rod is exactly cylindrical in form and that the axis of the bored-cut portion coincides with the axis of the rod.

The filling or pith 8 of the rod I is prepared separately. This filling is preferably made of (ci. 28o-11.37) `f so-called peddig reed, whichy is the pith of Spanish reed or rotang. The filling is first shaped by the usual means to form a cylinder which is somewhat smaller than the hollow interior of the rod 1. Then the filling B is immersed into a liquid consisting of two parts of potassium silicate in one part of water. The filling remains in this liquid for several hour until the liquid gradually penetrates the pores of the reed and until the reed is impregnated entirely with this liquid.

Obviously, any other suitable impregnating process known in the art may be used for-the purpose of impregnating the filling, for example, the filling may be treated by vapors of the described liquid.

After the impregnating process has been completed, the filling will expand somewhat,`and its outer diameter should be now only slightly smaller than the inner diameter of the hollow pole l. Then the filling is carefully dried for several hours. i i

Then the outer surfaces of the filling and/ or the inner surfaces of the hollowpole 'lf are coated with a specially prepared cold glue. vItis important that this cold glue must be used at a certain degree of consistency in order that the material of the filling 8 should be firmly connected with that of the pole l. As such glue, I prefer to use casein and chalk with sodium phosphate, l kg. glue-powder to be stirred up with 2.150 kg. water, until having the consistency of marmalade; the glue must be slaked until it gets thick and flows (not drips) down the spattle,

The filling 8 is introduced into the pole I and the glue is allowed to solidify, rmly interconnecting'the rod I and the filling 8.

The final step of the method of manufacturing the ski-pole is the insertion of the disc I and the ferrule II upon the lower end of the pole.

'Ihe disc IIJ comprises a hollow ring I2, which is preferably made of hardened non-corrosive aluminum, known in the trade as anticorodal. The interior of the ring I2 is lled with a filling I3, which, preferably, consists of peddig reed subjected to the same treatment; namely, the lling I3 is first impregnated with a liquid consisting of two parts of potassium silicate and one part of water, then carefully dried and covered by glue, and nally inserted into the ring I2.

As shown in Figures 1 and 2, the ring I2 preferably comprises six slits or openings I4 to which leather strips I are attached. The leather strips I5 are provided with the customary slits II through which the pole 'I extends. A metallic ring I8 and a pin I9 are used to keep the disc I0 in position upon the rod 1, the ring I8 being preferably made of a single piece with a ferrule The ferrule which is provided with a sharp point is preferably made of steel.

Figure of the drawing shows a portion of another ski-pole comprising a hollow pole 20, consisting of tonkin reed or pepper reed the interior of which is lled with several pieces 2| of peddig reed which are glued together by the glue 22.

The process of manufacturing this ski-pole is substantially the same as the one already described, namely, the reed pole 20 is carefully bored through, and. the pieces 2| are manufactured separately and then impregnated with a liquid consisting of two parts of potassium silicate and one part of water. The impregnated pieces 2| are carefully dried and then glued to each other and to the pole 2U by tn e glue 22,

which may be of the same type as the one already described.

'Ihe ski-pole shown in Figure 6 comprises a pole 30 made of tonkin reed or pepper reed and enclosing a pith or filling 3|, which may consist of peddig reed. The pole 3D and its filling 3| may be manufactured in the same manner as the pole shown in Figure 4. The outer surface of the pole 30 is coated by a coating or cover 32, which may consist of metal, such as aluminum, or of Celluloid, or of any other suitable material.

-The ski-pole manufactured in accordance with the present invention has a remarkably high solidity against splitting andl breaking without any noticeable increase in weight, as comparedv with poles used in the prior art. A ski-pole provided with the described lling may be bent to a large extent without breaking, and after the pressure upon the pole is released, it will unbend itself to the normal straight position. Thus the resiliency and the spring action of thel pole are increased to a considerable extent.

While priorv art ski-poles split or crack when they are brought into a warm atmosphere after having been previously subjected to low temperatures, the ski-poles manufactured in accordance with the present invention are insensitive to practically any change of temperature, even at high altitudes of 12,000 to 15,000 feet above sea level.

The described ski-poles may be left in the open over night at such altitudes, where the night temperature is often lower than 25 C. and the temperature in the daytime in the sun may be higher thang-50 C. In spite of these great changes in. temperature, the described ski-poles will not be damaged in any way thereby.

It is apparent that the specific illustrations shown above have been given by way of illustration and not by way of limitation, and that the structures and the methods above described are subject to Wide variation and modication Without departing from the scope or intent of the invention, all of which variations and modifications are to be included Within the scope of the present invention.

What is claimed is:

1. 'Ihe method of manufacturing a ski-pole, which comprises impregnating a filling consisting of a reed with a liquid consisting of two parts of potassium silicate and one part of water, and gluing the impregnated lling to the interior of a hollow pole consisting of a reed.

2. The method of manufacturing a ski-pole,

which comprises impregnating a lling consisti ing of peddig reed with a liquid consisting of two parts of potassium silicate and onepart of water, drying the impregnated filling, providing a pole consisting of a reed having a hollow interior, said filling fitting into said interior, inserting said filling into said interior and simultaneously gluing said filling to said pole.

3. -A ski-pole, comprising a hollow pole consisting of a fully grown reed, a reed lling situated within said pole, a ring consisting of anticorodal, a filling consisting of peddig reed and situated within said ring, and means connecting said ring with said pole.

ALICE MLLER-ROGGLI. 

